| Otnes, Simen M. | Simen M. Otnes | Actor | 2003 | 1 | |
| Opsahl, Kristina | Kristina Opsahl | Actor | 2004 - 2006 | 6 | |
| Olsen, Lars Reynert | Lars Reynert Olsen | Actor | 2005 - 2008 | 90 | |
| Obuchowicz, Bartek Kaminski | Bartek Kaminski Obuchowicz | Actor | 2005 | 1 | |
| Otterstedt, Lars | Lars Otterstedt | Actor | 2006 | 11 | 1 |
| Oltedal, Martin Johannes | Martin Johannes Oltedal | Actor | 2006 | 1 | |
| Oldani, Emilia | Emilia Oldani | Actor | 2006 | 2 | |
| Olsen, Julia Stefany | Julia Stefany Olsen | Actor | 2006 | 1 | |
| Oftebro, Jakob | Jakob Oftebro | Actor | 2006 - 2022 | 5 | 1 |
| Olsen, Elisabeth | Elisabeth Olsen | Actor | 2006 | 1 | |
| Olsson, Tove | Tove Olsson | Actor | 2008 | 10 | 3 |
| Opheim, Lea Basch | Lea Basch Opheim | Actor | 2009 - 2011 | 3 | |
| Oliversen, Stine | Stine Oliversen | Actor | 2009 | 1 | 1 |
| Ofsdal, Sofie | Sofie Ofsdal | Actor | 2010 | 1 | |
| Olsen, Mathilde Arschim | Mathilde Arschim Olsen | Actor | 2010 | 1 | |
| Olsen, Thea Arschim | Thea Arschim Olsen | Actor | 2010 | 1 | |
| Opedal, Herman Ljung | Herman Ljung Opedal | Actor | 2010 | 3 | |
| Olsen, Kim | Kim Olsen | Actor | 2011 - 2019 | 2 | |
| Oborotov, Yuri | Yuri Oborotov | Actor | 2012 | 2 | |
| Ottmar, Aurora Berentsen | Aurora Berentsen Ottmar | Actor | 2012 | 1 | |
| Olstad, Andrea | Andrea Olstad | Actor | 2012 | 2 | |
| Osvik, Erik Baltzek | Erik Baltzek Osvik | Actor | 2012 | 1 | |
| Offerdal, Sindre Strand | Sindre Strand Offerdal | Actor | 2012 - 2015 | 3 | |
| Oftedal, Stian | Stian Oftedal | Actor | 2012 | 2 | |
| Ordężanka, Janina | Janina Ordężanka | Actor | 1911 | 1 | |
| Owenberg-Lyche, Ragnhild | Ragnhild Owenberg-Lyche | Actor | 1911 - 1922 | 6 | 6 |
| O'Connor, Kathleen | Kathleen O'Connor | Actor | 1912 | 1 | |
| Odstrčilová, Liběna | Liběna Odstrčilová | Actor | 1913 - 1922 | 3 | |
| Ono, Shihoriko | Shihoriko Ono | Actor | 1914 | 1 | |
| Ozols, Jānis | Jānis Ozols | Actor | 1915 | 2 | |
| Orford, Cathleen | Cathleen Orford | Actor | 1913 - 1918 | 4 | |
| Osis, K. | K. Osis | Actor | 1916 | 1 | |
| Okornicka (Miłosz), Helena | Helena Okornicka (Miłosz) | Actor | 1916 | 1 | |
| Olsen, Tonny | Tonny Olsen | Actor | 1918 - 1924 | 5 | |
| Ortega, - | - Ortega | Actor | 1919 | 1 | |
| Olin, Anna | Anna Olin | Actor | 1919 | 1 | |
| Olander, Sigfrid | Sigfrid Olander | Actor | 1920 | 1 | 1 |
| Orlandini, Lia | Lia Orlandini | Actor | 1921 - 1922 | 5 | |
| Otáhalová, Lída | Lída Otáhalová | Actor | 1922 | 1 | |
| Olson, Jonas | Jonas Olson | Actor | 1922 | 1 | |
| Opøien, Lydia | Lydia Opøien | Actor | 1923 - 2006 | 13 | 1 |
| Ono, Miyakichi | Miyakichi Ono | Actor | 1925 | 1 | |
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